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Finding the Fourth Proportional to 189.36, 285.48 and 177.63

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Solution

The fourth proportional to 189.36, 285.48 and 177.63 is: 267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.36 : 285.48 = 177.63 : x
  2. Step 2: Convert to fraction form
    189.36/285.48 = 177.63/x
  3. Step 3: Cross multiply
    189.36x = 285.48 × 177.63
  4. Step 4: Simplify right side
    189.36x = 50,709.81
  5. Step 5: Solve for x
    x = 50,709.81/189.36
  6. Step 6: Final answer
    x = 267.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.